7results about How to "Large tolerance" patented technology

The present invention provides a terminal connection structure, comprising: an insulating housing to be mounted to a panel, the insulating housing having a through terminal channel; a primary terminal structure disposed in the terminal channel, the primary terminal structure is to establish an electrical connection running through the terminal channel; and a soldering terminal, one end of the soldering terminal is to be soldered to a circuit board spaced apart from the panel, and the other end of the soldering terminal is to be plugged into the primary terminal structure, wherein one end of the primary terminal structure comprises a first elastic coupling member for establishing a slidable electrical connection with the soldering terminal.

The invention discloses a PET composite folded plate type periodic structure air inlet noise reduction pipeline which comprises a noise reduction pipeline body, noise reduction areas are circumferentially distributed on the noise reduction pipeline body, acoustic cavities protruding outwards are formed in the noise reduction areas, and each acoustic cavity is correspondingly provided with a folded plate type periodic acoustic crystal structure. The folded plate type periodic acoustic crystal structure comprises a plurality of acoustic cells which are sequentially arranged in the axial direction, each acoustic cell is composed of a scatterer and a base body, the scatterer is fixed to the front face of the base body, and the back face of the base body is fixedly connected with the acoustic cavity; and the base body in the axial direction is periodically folded. The problem that a traditional single-layer PET noise reduction pipeline is low in transmission loss at the low and medium frequency of 1000 Hz or below is solved, a folded plate type periodic acoustic crystal structure is additionally arranged on the basis of a traditional PET pipeline, the traditional pipeline and the acoustic crystal structure are fully combined, the traditional pipeline solves the high and medium frequency problem, the acoustic crystal solves the low frequency problem, and the noise reduction effect is good. Therefore, the full-band transmission loss is obviously improved.

The utility model relates to a kind of multimode single-fiber bidirectional optical assembly and vehicle-mounted optical module, including lens body, it is characterized by: being equipped with light port, lens A, first prism, lens B, second prism and lens C on lens body, the light port, lens A, first prism and lens B are located on the same axis on the side of lens body, the second prism and lens C are located on the same axis on the other side of lens body, the first prism and second prism are parallelly arranged and on the same water surface, and the optical path between the two is communicated.The utility model provides a kind of multimode single-fiber bidirectional optical assembly design scheme applied to COB packaging at low cost, and scheme can be formed by mould once, and batch production at low cost can be realized.In addition, scheme tolerance is big, can realize VCSEL chip and PD chip simultaneous coupling, reduce the difficulty of vehicle-mounted optical module packaging, promote the acceleration industrialization of vehicle-mounted optical module.

The application discloses a filter based on a multi-mode subwavelength grating. The filter comprises a mode demultiplexer for multiplexing and demultiplexing of a base mode and a high-order mode, a subwavelength grating for weakly binding regulation of a mode field of the base mode and the high-order mode, and a straight-through waveguide for output of the base mode. The application introduces a structure of the subwavelength grating and weakly binding regulation of the mode field, and by virtue of excellent flat dispersion regulation characteristics, the application realizes apodization of the grating while keeping consistent local refractive index of the grating, thereby obtaining the filter with high side mode suppression ratio and no free spectral range limitation, and the filter can realize flat and low-loss spectral response, meets the next-generation large-capacity and high-speed wavelength division multiplexing transmission demand, and has the advantages of simple structure, simple process, excellent performance and the like.

This invention relates to the field of building construction technology and discloses a precast column and an assembled concrete structure. The precast column includes a column body and a steel reinforcement cage. The column body is typically a concrete structure. The steel reinforcement cage includes multiple steel bar bundles, which are disposed within a first column cavity, with each bundle corresponding to one of the first column cavities. Each bundle includes multiple column steel bars, the first end of which extends out of the first column cavity. The column steel bars within the first column cavity enclose and form an lap space. The column steel bars extending out of the first column cavity are bent towards the central axis of the lap space to form a bent section. By setting up a first column cavity, the amount of concrete used is reduced, lowering the self-weight of the precast column and the costs of transportation and hoisting. By setting up the extended bent section, automatic centering and guidance are provided when connecting two layers of precast columns, increasing the tolerance for connection, reducing the requirements for on-site construction precision, and improving construction efficiency.

The invention relates to a welding torch for plasma processing. The sealing and electrically conductive connection between the different components (A, B) of the welding torch is achieved by using at least one elastically deformable and electrically conductive sealing member (D).

The present invention provides a spring pocket, a spring cushion, furniture and a method of manufacturing the spring pocket. The spring pocket includes a conical spring having a large-diameter end and a small-diameter end opposite to the large diameter end, and a flexible bag. The flexible bag includes an outer layer located at an outer side of the conical spring and an inner layer located at an inner side of the conical spring, and the outer layer and the inner layer are respectively jointed at the large-diameter end and the small-diameter end to encapsulate the conical spring in the flexible bag. The flexible bag is formed by overlapping a first flexible sheet and a second flexible sheet material which are completely identical to each other, and jointing them at corresponding edges. According to the present invention, the production process of the flexible bag may be simplified, and the production efficiency be improved. The sheets for producing the flexible bag are produced in a single step. Even though the sheets have a large machining tolerance as compared with a normal size or structure, since the two sheets are completely identical, they may still match each other and can be easily overlapped and jointed, which helps to reduce the effect caused by machining tolerance and to improve the production qualification ratio.